Activity sensor



FIG. 1 is a perspective view of an activity sensor in accordance withthe present design.

FIG. 2 is a top view of the activity sensor in accordance with thepresent design.

FIG. 3 is a bottom view of the activity sensor in accordance with thepresent design.

FIG. 4 is a left side view of the activity sensor in accordance with thepresent design.

FIG. 5 is a right side view of the activity sensor in accordance withthe present design.

FIG. 6 is a front view of the activity sensor in accordance with thepresent design.

FIG. 7 is a back view of the activity sensor in accordance with thepresent design; and,

FIG. 8 is a reference view of the activity sensor shown disposed withinan article of footwear, such as a shoe.

The features shown in broken lines in the various Figures are forillustrating reference or environmental structure and form no part ofthe claimed design.

The ornamental design for an activity sensor, substantially as shown anddescribed.